Display device

Abstract

In a display device according to an embodiment of the present disclosure, a redundant light-emitting element is disposed on a line substrate separate from a panel unit in which the main light-emitting element is included, thereby reducing occurrence of a defective pixel due to a defective main light-emitting element.

1 . A display device, comprising:
 a substrate;   a first sub-pixel on the substrate, the first subpixel having a first light emitting element and a second light emitting element each configured to emit light of a first color, the first and second light emitting element coupled to a same first driving transistor; and   a second sub-pixel on the substrate, the second subpixel having a third light emitting element and a fourth light emitting element each configured to emit light of a second color different from the first color.   
     
     
         2 . The display device of  claim 1 , wherein the third light emitting element is coupled to a second driving transistor, and the fourth light emitting element is coupled to a third driving transistor different from the second driving transistor. 
     
     
         3 . The display device of  claim 1 , wherein a first cathode of the first light emitting element and a second cathode of the second light emitting element are connected to each other. 
     
     
         4 . The display device of  claim 1 , wherein a first anode of the first light emitting element and a second anode of the second light emitting element are connected to each other. 
     
     
         5 . The display device of  claim 1 , wherein the first light emitting element is defective and the second light emitting element is in a functioning condition. 
     
     
         6 . The display device of  claim 1 , further comprising a third subpixel on the substrate, the third subpixel including only one fifth light emitting element configured to emit light of a third color different from the first color and the second color. 
     
     
         7 . The display device of  claim 1 , wherein the first light emitting element includes a cathode electrode, an anode electrode, a semiconductor structure between the cathode electrode and the anode electrode, and a protection layer on a sidewall of the semiconductor structure. 
     
     
         8 . The display device of  claim 7 , comprising a connection electrode connected to the anode electrode, the connection electrode overlapping with the protection layer. 
     
     
         9 . The display device of  claim 7 , comprising a connection electrode connected to the cathode electrode, the connection electrode overlapping with the protection layer. 
     
     
         10 . The display device of  claim 8 , comprising an interconnection structure connected to the cathode electrode, the interconnection structure at least partially on a same level as the connection electrode connected to the anode electrode. 
     
     
         11 . The display device of  claim 7 , comprising an adhesive layer between the semiconductor structure and the substrate. 
     
     
         12 . The display device of  claim 11 , wherein the adhesive layer and the protection layer are separated from one another. 
     
     
         13 . The display device of  claim 1 , wherein the first subpixel includes a transmissive area. 
     
     
         14 . The display device of  claim 1 , wherein the first light emitting element and the second light emitting element of the first subpixel are on a same level. 
     
     
         15 . The display device of  claim 7 , wherein the semiconductor structure includes a staggered shape in a cross-sectional view. 
     
     
         16 . A display device, comprising:
 a plurality of panel units, wherein each panel unit includes a plurality of signal lines, a plurality of first light-emitting elements, and a thin-film transistor configured to apply a driving signal to the plurality of first light-emitting elements;   a substrate including a plurality of link lines and a plurality of second light-emitting elements; and   a plurality of first connection members and a plurality of second connection members disposed between the substrate and the panel units,   wherein a first connection member of the plurality of first connection members electrically connects a link line of the plurality of link lines to a signal line of the plurality of signal lines,   wherein a second connection member of the plurality of second connection members electrically connects a second light-emitting element of the plurality of second light-emitting elements to a thin-film transistor.   
     
     
         17 . The display device of  claim 16 , comprising a circuit film electrically connected to the link line on one side of the substrate,
 wherein the circuit film is configured to send a signal to the signal line via the link line.   
     
     
         18 . The display device of  claim 16 , wherein a first light-emitting element corresponding to the thin-film transistor connected to the second connection member and the second light-emitting element connected to the second connection member are configured to emit light of a same color. 
     
     
         19 . The display device of  claim 16 , wherein each panel unit of the plurality of panel units includes a plurality of sub-pixels,
 wherein each of the plurality of first light-emitting elements is disposed in a subpixel of the plurality of sub-pixels,   wherein each of the second light-emitting elements is selectively present in a sub-pixel of the plurality of subpixels, and at least some of the plurality of sub-pixels are free of any second light-emitting element of the plurality of second light-emitting elements.   
     
     
         20 . The display device of  claim 19 , wherein the second light-emitting element is present in the sub-pixel where a defective first light-emitting element is disposed,
 wherein the second light-emitting element is absent in a sub-pixel in which a normal first light-emitting element is disposed.   
     
     
         21 . The display device of  claim 16 , wherein the first light-emitting element includes a first anode electrode and a first cathode electrode, the first anode electrode configured to receive the driving signal,
 wherein the second light-emitting element includes a second anode electrode and a second cathode electrode,   wherein the second anode electrode is electrically connected to the first anode electrode.   
     
     
         22 . The display device of  claim 21 , wherein each panel unit further includes a first anode connection electrode electrically connecting the thin-film transistor and the first anode electrode to each other,
 wherein the substrate further includes a second anode connection electrode electrically connected to the second anode electrode,   wherein the second connection member electrically connects the first anode connection electrode and the second anode connection electrode to each other.   
     
     
         23 . The display device of  claim 16 , wherein the first light-emitting element includes a first anode electrode and a first cathode electrode, the first cathode electrode configured to receive the driving signal,
 wherein the second light-emitting element includes a second anode electrode and a second cathode electrode,   wherein the second cathode electrode is electrically connected to the first cathode electrode.   
     
     
         24 . The display device of  claim 23 , wherein each panel unit further includes a first cathode connection electrode electrically connected to the thin-film transistor,
 wherein the substrate further includes a second cathode connection electrode electrically connected to the second cathode electrode,   wherein the second connection member electrically connects the first cathode connection electrode and the second cathode connection electrode to each other.   
     
     
         25 . A display device comprising:
 a first body, the first body including a substrate layer and one or more light emitting elements on the substrate layer;   a plurality of panel units each coupled to the first body in a first direction, the plurality of panel units positioned with respect to one another in a second direction that traverses the first direction, each panel unit of the plurality of panel units including a thin-film transistor,   wherein a first light-emitting element of the one or more light emitting elements of the first body is electrically connected to a first thin-film transistor of a first panel unit of the plurality of panel units.   
     
     
         26 . The display device of  claim 25 , wherein the first panel unit includes a second light-emitting element in a same subpixel as the first light-emitting element, and the second light-emitting element is defective. 
     
     
         27 . The display device of  claim 26 , wherein the first light-emitting element and the second light-emitting element are configured to emit light of a same color. 
     
     
         28 . The display device of  claim 26 , comprising a connection structure that electrically connects between a terminal of the first light-emitting element and a terminal of the second light-emitting element. 
     
     
         29 . The display device of  claim 25 , wherein the first body includes a link line and the first panel unit includes a signal line, and
 the display device further comprises a connection structure that electrically connects between the link line and the signal line.